The use of the reduction of the proportion of the model test technology can predict and pre-audition hall acoustic characteristics, long-term to the hall sound quality design is often using the scale model is the actual size of the building according to the size of 1:10 or 1:20 to produce a model, In the model to study the propagation and acoustic characteristics of sound waves, and according to a certain proportion of the relationship translated into the actual hall, so as to understand the characteristics of its acoustic characteristics.

It can be seen that satisfying the various conditions of the scale model experiment is also high, it is difficult to complete all the experiments in a model, and these conditions can be simplified by making a model for an experimental purpose. For example, only to understand the geophysical characteristics of the acoustic line, the position of the reflection point, and so on, without involving the acoustic energy distribution, as long as the geometric similarity of the model, the use of light beam instead of sound source, the inner surface of the mirror, In the model is full of smoke, you can visually see the path of several lines of reflection.
In recent years, with the development of high-frequency acoustic instruments and measurement technology, high-quality tweeter and microphone, professional high-frequency multi-beam recorder, real-time analyzer and data processing equipment have come out for the scale model experiment in the high frequency sound Acoustic measurements provide technical means, such as in the attenuation process, reverberation process, impulse response and other measurements can be in the model of the microphone output signal for high-speed recording, and then 1: n low-speed playback, you can get the physical hall the result of. However, due to the high cost of production, the need to fill the dry air method to reduce the high frequency air absorption, and simulation of material sound absorption characteristics difficult to control factors, this method there is a big limitation.

With the development of computer technology, computer mathematical model began to replace the scale model. The original according to the classic formula on the hall architectural acoustics reverberation time, language clarity and other parameters with artificial complex computing work, and gradually replaced by computer-aided design. It is estimated by geometric acoustics and is also replaced by the computer sound field simulation based on geometric acoustics and the virtual sound source method.
The so-called "sound line tracking method" is from the sound source to the emission of acoustic particles, reflecting the reflection surface in accordance with the reflection angle is equal to the angle of entry to determine the new propagation direction, tracking their propagation path. Sound particles due to reflection of the face of the absorption of sound, energy gradually decay.

In order to calculate the acoustic field of the auditory point, it is necessary to define a three-dimensional region around the auditory point to capture the passing particles. To ensure accuracy, there must be a sufficiently dense sound line and a sufficiently small audible point spherical area.
The main advantage of the line tracking method is that the algorithm is simple and easy to operate in the computer. The disadvantage is that the workload is large. Since the 1980s, some famous companies have developed acoustic simulation computer aided design software. At present, Using the German Ahnert acoustic design company developed EASE design software.
Now ADA's EASE acoustics simulation software has been widely used in more than 40 countries around the world, and its loudspeaker database contains speaker data from more than 70 well-known speakers in the world. Therefore, EASE acoustic simulation design software has become a unified acoustic simulation platform. So the manufacturers of the speaker calculation results will have a relatively comparable.
Video effect map

EASE enables acoustic consultants, architects, sound engineers and decoration designers to estimate the acoustic characteristics of the building and the sound reinforcement system features, and can visually see the design of the hall sound reinforcement system The expected acoustic characteristics of the map, to understand the hall surface of the building used in the sound-absorbing material and the use of the speaker model, placed position, azimuth. On the actual building renovation works and hall sound reinforcement system works have a good practical guidance.